Elise Del Rosario,Begoña Vitoriano,Gerhard-Wilhelm Weber
Elise Del Rosario
The presented issue concerns publications presented as part of the Workshop 2018 of the EURO Working Group on Operational Research for Development (EWG-ORD) held in Complutense University of Madrid (Spain), July 5-7. This editorial presents...
No such thing as a perfect hammer: comparing different objective function specifications for optimal control [0.03%]
完美锤子的存在？比较最优控制的不同目标函数规范
D Blueschke,I Savin
D Blueschke
Linear-quadratic (LQ) optimization is a fairly standard technique in the optimal control framework. LQ is very well researched, and there are many extensions for more sophisticated scenarios like nonlinear models. Conventionally, the quadra...
Optimal investment and location decisions of a firm in a flood risk area using impulse control theory [0.03%]
基于脉冲控制理论的企业洪水风险区最优投资与选址决策模型研究
Johanna Grames,Dieter Grass,Peter M Kort et al.
Johanna Grames et al.
Flooding events can affect businesses close to rivers, lakes or coasts. This paper provides an economic partial equilibrium model, which helps to understand the optimal location choice for a firm in flood risk areas and its investment strat...
Krzysztof S Targiel,Maciej Nowak,Tadeusz Trzaskalik
Krzysztof S Targiel
In many projects the problem of selecting the start time of a non-critical activity arises. Usually it is possible to use the "as soon as possible" or "as late as possible" rules. In some situations, however, the result of such a decision d...
Sophie N Parragh,Karl F Doerner
Sophie N Parragh
Pairwise route synchronization constraints are commonly encountered in the field of service technician routing and scheduling and in the area of mobile care. Pairwise route synchronization refers to constraints that require that two technic...
Stochastic contagion models without immunity: their long term behaviour and the optimal level of treatment [0.03%]
无免疫的随机传染模型及其长期行为和最佳治疗水平
Raimund M Kovacevic
Raimund M Kovacevic
In this paper we analyze two stochastic versions of one of the simplest classes of contagion models, namely so-called SIS models. Several formulations of such models, based on stochastic differential equations, have been recently discussed ...
Margaretha Gansterer,Richard F Hartl,Philipp E H Salzmann
Margaretha Gansterer
In this study we investigate the decision problem of a central authority in pickup and delivery carrier collaborations. Customer requests are to be redistributed among participants, such that the total cost is minimized. We formulate the pr...
Christian Burkart,Tina Wakolbinger,Fuminori Toyasaki
Christian Burkart
Performance measurement of Non-Profit Organizations (NPOs) is of increasing importance for aid agencies, policy-makers and donors. A widely used benchmark for measuring the efficiency of NPOs is the overhead cost ratio, consisting of the to...
Immanuel M Bomze
Immanuel M Bomze
A symmetric matrix of order n is called completely positive if it has a symmetric factorization by means of a rectangular matrix with n columns and no negative entries (a so-called cp factorization), i.e., if it can be interpreted as a Gram...
Why local air pollution is more than daily peaks: modelling policies in a city in order to avoid premature deaths [0.03%]
为什么局部空气污染不仅仅是一天的峰值：模拟城市政策以避免早死现象
Doris A Behrens,Olivia Koland,Ulrike Leopold-Wildburger
Doris A Behrens
We use a predator-prey representation of an urban system to analyse how policy interventions can prevent the adverse effects of air pollution on people's health. The number of residents is treated as prey variable, and particulate matter th...